Improvement in pulverizing and grinding machines



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' J.J.WEBSTER.

Improvement in Pulverizing and Grinding Machines.

No. 122,748, 4 Patented Jan. 16, 1872.

I Inventor M a W7 @T To all whom it may concern:

.as earths, stones, quartz, and other natural I FFIOE.

JEROME JOSIAH WEBSTER, OF MAGOG, CANADA.

Specification forming part of Letters Patent No. 122,748, dated January16, 1872.

SPECIFICATION.

Be it known that I, JEROME JOSIAH WEB- STER, of the village of Magog, inthe district of St. Francis, in the Province of Quebec, Canada, trader,have invented new and useful Improvements in Pulverizing and GrindingMachines and I do hereby declare that the following is a full, clear,and exact description of the construction and operation of the same,reference being had to the annexed drawing, where- Figure I represents aside elevation of the machine. Fig. II represents a longitudinalvertical section of the machine. Fig. III represents an end elevation ofthe machine. Fig. IV represents a transverse section of the machine.Fig. V represents a detail. Fig. VI represents a detail.

This invention has reference to improve ments on machines used fordisintegrating or reducing to powder various substances, such products,and manufactured articles requiring to be levigated for market, such aslitharge, colors, and other chemical compounds, and reducin g to flourany of the various grains, for the purpose of producing a simpler andcheaper machine than those at present employed, and at the same time onecapable of doing the work equally well or in a superior manner.

The drawing hereunto annexed is drawn to a scale of about three-quartersof an inch to the foot; but I do not confine myself to this scale, asthe dimensions of the machine will be varied to suit the work they areemployed 1n.

Similar letters of reference indicate like parts in the differentfigures.

'a, is the frame-work, of any ordinary and suitable construction, ofWood or iron, its only re markable feature being stability. 1) is thebed on which the frame-work a is raised. On the upper rails of theframe-work are situated two plumber-blocks, 0, of any ordinaryconstruction, secured to or made in one with its In the space existingbetween the two sides of the framework a a casing is situated,consisting of two disks, d, with a short cylinder, e, interposed betweenthem. In the center of the disks a hole is bored for the shaft f to passand revolve freely through. The edges of the cylinder 0 are madeparallel, so that when they are bolted together the faces of the disks01 may also be parallel. The whole casing is then placed concentricallywith the center line of the two plumber-blocks c, and at right angleshorizontally and vertically with it, equally distant from bothplumber-blocks, with the bottom edges resting upon or bedded into thebed 0, the whole being held in place by the strap 9, secured to theframe by any suitable bolts. The cylinder 6 and disks d are securedtogether in the ordinary manner, as in steam-engines, or, if preferred,it may be made in one with one of the disks. The shaft f is extended toone end through the plumber-block, and on this extension is placed thedriving-pulley or other suitable gear-wheel h. On the part of the shaftwithin the casing, or' between the ends at of the cylinder, is placedand secured a wheel, '5, of the configuration clearly shown in Figs. IIand IV. The wheel is not a true circle, but on its periphery, composedof tangential arcs, with their ends terminated in superficies h to actas hainmers. These superficies are extended beyond the width of thethickness of the wheel 43 by attaching supplementary pieces K thereto;but I prefer to form them in one with the wheel; thus ifthe wheelbemadeof wroughtiron or steel theproj cctions Kmaybe jumped on; if ofcast-iron, they can be molded in the sand and run in one piece at thetime of casting the wheel. In the disks d openings are made for theintroduction of the feed-pipes I, one in each, as shown in the drawing.They convey the material to be acted upon by the machine and deposit itupon the hub of the revolving wheel 6. In addition to the supplementarypieces K above described others of a similar character may be added onthe sides of the wheel 2'; these, if used, will be situated as shown atm, so that they pass round when revolving in a circle just without theopening of the pipes lthrough the disks. The faces of these m, as wellas those 70, are radial to thecenter of the shaft f. Again, if desired,on the inside of the disks d projections 92, as indicated by dottedlines in Fig. 2, may be attached or made in one with them. These are ofa similar character to those described as k and m, and are so situatedthat, as the wheel '17 revolves, those marked it will revolve outsidethem, while those marked at revolve inside. In each case a suitableamount of clearance must be allowed. The faces of these projections willbe set at an angle so that particles struck by the projections m, andstriking against those of n, will diverge at such an angle as to becaught by the surfaces of k. In some cases I prefer to corrugate theinner surfaces of the disks by any suitable corrugations extending fromabout the circle described by the inner side of the supplementary piecesm to the cylinder 0, as shown in Fig. V. These corrugations may haveeither of the two forms shown in Fig. VI, as for some materials theangles and straight sides will be found more effective, while for othersthe curved lines may answer best. 0 are the discharge-pipes. If desired,their number and size may be increased, and their position on the disksd situated higheror lower, as required. 12 is a door, by which anexamination of the inside may be made without taking the machine apart.

The machine is operated as follows: The pulley h being caused to revolveby means of any suitable power and with the requisite velocity, and withit the shaft f and wheel 1', the material to be pulverized or ground isthen introduced down the pipes Z, the action of the machine itselfproducing a strong current of air and assisting the material to enterinto the casing formed by the cylinder 6 and disks d; here it meets withthe hammers h and k, where,

by their action and by the attrition and abrasion of the masses orparticles them selves with one another, they become reduced to powder,in which form the strong current of air caused by the revolution of thewheel, having no other means of escape than by the pipes 0, carries withit the finely-reduced particles into any suitable chamber, where theyare allowed to subside. The corrugations hereinbefore described,together with the projections in and n, all or any of them may be addedor not to assist the action described, and may be used to greatadvantage of such material as grain that is to be reduced to flour; butI prefer, when hard substances, such as ores, quartz, stones, 820., areto be acted upon, to use only the surface h and supplement it.

Having now described the construction and operation of my invention,what I claim, and wish to secure by Letters Patent, is as follows:

1. The combination of the disks (1, cylinder 0, and wheel i, providedwith projections K, constructed as described, substantially as and forthe purpose set forth.

2. In combination with the disks cl, cylinder e, and wheel. i,constructed as described, the projectionsm a, substantially as and forthe purpose set forth.

Montreal, 17th day of October, A. D. 1871.

JEROME JOSIAH WVEBSTER.

Witnesses:

CHARLES G. G. SIMPSON,

A. B. MUIR. (3)

